Pulp-screen.



F. G. FEBLEY. PULP SCREEN.

APPLICATION FILED JUNE 22, 1908.

1,014,288. Patented Jan.9,1912.

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COLUMBIA PLANUGRM'H co..wAsH|NGToN, n. C.

E. G. PBELBY. PULP SCREEN. APPLICATION FILED JUNE 22, 1908..

` Patented Jan. 9, 1912.

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`uNiTED sTATEs PATENT oEEioE.

FRANK Gr. FEELEY, 0F WATERTOWN, NEW YORK, ASSIGNOR T0 HARMON MACHINECOMPANY, 0F WATERTOWN, NEW YORK.

PULP-SCREEN.

Specification of Letters Patent.

Patented Jan. 9,1912.

To all whom it may concern:

Be it known that I, FRANK G. FEELEY, a citizen of the United States,residing at Watertown, in the county of Jefferson and State of New York,have invented a new and useful Improvement in Pulp-Screens, of which thefollowing is a specification.

This invention relates to that class of pulp strainers in which amovable diaphragm or bellows plate is arranged below the screen plateand moved up and down by a cam mechanism. In machines of this kindmotion is transmitted from the cam to the diaphragm in most cases by anupright plunger rod or member which is connected at its upper end withthe diaphragm and carries at its lower end a shoe which rides on therotary cam, the plunger rod being pressed downwardly byl a spring whichholds the shoe against the cam. Inmachines of this constructionconsiderable friction is developed between the shoe and the cam, whichresults in various difficulties, among them that the shoes, which areusually of wood, require to be frequently renewed, that the cams areoften worn out of shape, that an excessive amount of power is requiredfor operating the machine, that the eiliciency of the diaphragm becomesimpaired as the shoe becomes worn by the lowering of` the position ofthe diaphragm, that`the tension of the'spring becomes reduced as theshoe wears down, and that the diaphragm may be" raised too high and insome cases be broken by inserting a shoe which is too high.

The object of my invention is to produce a mechanism for connecting theactuating cam with the diaphragm by which these diliiculties areavoided.

In the accompanying drawings, consisting of two sheets: Figure 1 is alongitudinal sectional elevation of one end of a pulp strainer providedwith my improvements. Fig. 2 is a sectional elevation of the cam andconnecting parts, on an enlarged scale, in line 2 2, Fig. 3. Fig. 3 is alongitudi# nal sectional elevation in line 3 3, Fig. 2. Fig. 4 is atransverse vertical section in line 4-4f, Fig. 1. Fig. 5 is a horizontalsection in line 5 5, Fig. 4, on an enlarged scale.: Fig. 6 is asectional elevation of the spring and connecting parts, on an enlargedscale.

Like reference characters refer to like parts in the several figures.

' pivoted at its A Lrepresents the stationary horizontal bellows framesupporting the vat a. B the stationary screen plates, C the movablediaphragms, c the plungers or plates secured to the under sides of thediaphragms, D one of the upright end frames, E the longitudinal girdersecured thereto, F the horizontal driving shaft supported by bearings onthe end frames and girder, and Gr the actuating cams on the drivingshaft. All

of these parts may be of any suitable or well known construction. y

H represents an upright strut or plunger frame which is secured at itsupper end to the movable plunger or plate c and extends downwardly tothe actuating cam on which it bears by meanspof a roller I. The latterturns upon a horizontal arbor z', preferably, as shown, by means of ballbearings i arranged within the end portions ofthe roller. The arbor issecured in the lower portion h of the strut I-I which is bifurcated tostraddle the roller.

K represents an oscillating guide link which controls the lower end ofthe strut in its up and down movement and which is outer end to a fixedsupport of any suitable construction. As shown, the link is bifucatedboth at its outer and inner ends and straddles at its outer end abracket L which is secured to the girder E and carries a horizontalarbor Z which forms the` fulcrum of the link. The inner bifurcated endof the link straddles the lower end of the strut and is connected withboth ends of the arbor i of the roller. The lower end of the strut isprovided with a housing m for the roller and the girder is provided witha housing n for the cam. The strut is pressed downwardly so as to holdthe roller closely in contact with the cam by a spring O which is seatedat its lower end against a cross piece p or other suitable portion ofthe strut, and which restsy with its upper end against an adjustableabutment, for instance, nuts g applied to an upright threaded stem orstud r. The latter is fastened at its upper end to a bridge tree s whichis secured to the stationary frame A and extends through an opening inthe strut. The adjustable abutment or nut of the spring being applied toa stationary part, the stem or stud r, it is not liable to the springwhich would be increased if the nuts should work down on the stud. Thisarrangement of the parts also permits of the ready removal of thespring.

The roller I makes contact with the cam with a minimum amount offriction and the roller and strut are controlled and guided in their upand down movement by the oscillating link also with a minimum amount offriction,.so that the mechanism requires a comparatively small amount ofpower for its operation and is not liable to frequent derangements bywear. The link resists the side thrust of the cam and prevents thediaphragm from being pulled away from the stationary frame. v

I claim as my invention:

1. The combination with a movable diaphragm and its rotary actuatingcam, of an upright actuating member connected at its upper end with thediaphragm, a guide linkl pivotally connected with the lower end of Ysaid member, and a roller arranged at the junction of the link andupright member and making contact with the cam, substantially as setforth.

2. The combination with a movable diaphragm and its rotary actuatingcam, of an upright actuating member connected at its upper end with saiddiaphragm andv provided at its lower end with means for engagingV saidcam, anda guide link pivoted at its outer end to a fixed support andconnected at its inner end by a horizontal'pivot with the lower end ofsaid upright member, substantially as set forth.

3. The combination with a movable diaphragm and its rotary actuatingcam, of an upright actuating member connected at its upper end with saiddiaphragm and having a forked lower end, a horizontal arbor secured insaid forked end, a roller mounted on said arbor within said fork, and aforked guide link connected with said arbor, substantially as set forth.

il. The combination with a movable diaphragm and its rotary actuatingcam, of an upright actuating member connected at its upper end with saiddiaphragm and having a forked lower end, a horizontal arbor secured insaid forked end, a roller mounted on said arbor within said fork, ballbearings arranged within said roller and interposed between said rollerand arbor, and a forked guide link connected with said arbor,substantially as set forth. v

5. The vcombination with a stationary support, a movable diaphragmarranged therein and a rotary actuating cam, of an upright actuatingmember connected at its upper end with said diaphragm, a spring pressingsaid actuating member against said cam, a screw-threaded stud secured atits upper end to said support and extending downwardly therefrom, and anut which is appliedto said stud and against which the upper end of saidspring bears, while the lower end of said spring bears against saidupright member, substantially as set forth.

Witness my hand in the presence of two subscribing witnesses.

FRANK G. FEELEY. Witnesses: v Y

GEORGE W. TRIrr, M. DBELLINGER. Y

Gopies of this patent may be obtained for five cents each,V byaddressing the Commissioner of Patents,

Washington, D. C. v f

